It's OK, Chuckles, I finally found out what was wrong. (It wasn't the configuration.) Thank you for answering, though.

This game doesn't seem to be as picky as the first one, so maybe even a 'Dungeon of Drax' configuration might work. And the game itself is different from the first, in the sense that the controller now controls the barbarian; you no longer have use for the mouse.

Here are the basic settings, in case anyone else needs them:RAM: 512 Chip, 512 SlowROM: kickstart 1.3CPU: 68000, Match A500 speedChipset: Full ECS, Fast Copper
It should work. And it should work in WinFellow, too, either with 512 Chip and 512 bogo, or with 1024 Chip.